Warp stop mechanism for looms



July 6,1926. v

l E. J.,

ATTORNEY Patented 6, 1926,

-umrsp. STATES ROBERT .ninin isorn4 or y UTIOA, Nuvvfvom; AssIGNoR. To D RABER CORPORATION, HOPEDALE, MASSACHUSETTS, AOORPORATION ORMAINE@ i Vvwams s Tor-MnoHANIsM FOR fools/rsfk f v`lippnea'imi:med January 1s, 1926. serial No. 81,930."

' This invention relates tomechanical; warp stop mechanisms for looms andis more parti'cularl directed to the location ofthe warpv fault W lich may result either from a broken or too slack warp thread. f

It is nownthe common'practice to? provide looms with warp*stopmechanismgone form of which comprises'drop wires normallysupfv ported by the warp threads during weaving, and av drop wire detector having a detecting movement, adapted'to be arrested by au drop wire/on the occurrence of a rwarp fault, and thereupon effect loom'stoppage.

Muchdiliiculty 's experienced in locating the particular warp thread 'which has caused the'loom tozstop, and efforts have, been made Y to provide means for this' purpose, 'some of which give atwisting movementfto a drop wirewhen it is releasedby a broken or too slackwarp thread, and in o'thers'of whichv the drop wire detector itself lis 4utilized to move the fallen drop wire into, a warp vfault d indicating position.

, quently have 'an lateral movement, thatis' ,ja movement transversely of j the kloom,`.sfa'ndv when this becomes excessive, the `dropw1res One of the objects of the present invention is to. provide a warp stop mechanism with warp faultindicating means,fby whicll1 the downward. movement vof a released' drop wire will at once. indicate to the loom'attendant 'where the warp yfault has occurred', without at the samethime subjecting the drop wire itself vto any bending, twisting or other move'- ment calculated to injure the drop wire.

In accordance with the present invention,

the warp fault'indicating means'comprisefsfadeflector located at' the lower portion l'of the warp support and havingra downwardly and outwardly inclinedv surface which is nor` mallyl vbelow thek lower Yends ofthe dropA which'it will be deflected'into its indicatingv j position upon the 'occurrence [of a warp fault.

fAfurth'er `feature ofzthe inventionlcon'- siste. inzprovidinglthe warp fault locating deflector with divisiongwalls between which theV lower ends of the drop wires may move Vas theypass along the downwardly inclined deflecting surface into they path'of thedrop wire detector;

ADuring weaving, the warp threads fre-' 1 are liable 'to interfere with each other when one 'of them'is' released by al brokenor toO slack Warp thread'. 1 `Another feature' lof `the invention',v therefore, consists in providing the warp fault'locatingv deflectorwith a vertically extending surface, which projects Vabove the lower ends ofthe dropwlres durzor Y ing'weaving, the division walls Vofthe .Au/p v wardly vextending surface'acting fat' -such timesv to. maintain the drop eral displacement. f Y Y Theinvention and novel'v features and new combination of parts'will best-be'made fclear or raised position; and

wiresfromflatzi 1 Y M Vfromfthe following description andthe ace i A Fig. l isa perspective viewpartlylbroken Y i .F ig. 2`is across-section-of the vwarpstop v y mechanismshowmg vone of the drop wiresl as having been released by its'warpthread and deflected the downwardly inclined surface ofthe delector. g

Thefmeans forV effecting loom stoppage on= the occurrence of a warp faultisii'ot herein sho-wn because the details thereof 'formuio part ofthe present invention "and arenow wellunderstoody i Rising from the loom frame are the lvertical supports l, one 'at each side of the loom, upon which are adjustably secured the foot portions. 2 ofthe side brackets Vor supports 3. Extending vdownwardly from each ofthe side brackets 3,2,is an arm 4in which is mounted the detector vibrating shaft 5,and

secured tothe shaft 5 yare'th'e detector 'arms be secured to thearms by appropriate means i such as the screws 8.'

The detector .shaft 5 Vvhas extending therefrom theV arm19 connected by a rod l0 to loosuitablemeans onthe lowerfor cam shaft of the-loom, for imparting to 'the detectorits vibrating or' detecting movement', but* 'since such train of mechanism'is'now well :knownV and understood by f those ,familiar with', the

art, itis 'not herein shown and described as the details thereof 'form' l nc'ifpart'o'f the present invention, Athe 'essentials Y b'ei'1 1g,'l las usual, that the detector be 'given itszvibrating orV zdetecting' movements ,and'fup'on arrest:

thereof by a fallen drop wire thatthe loom shall be stopped to enab-le the loom attend- Y ant to piece up the broken or too slack warp thread. Y Y y Extending-transversely of the loom between the side brackets or supports 3 arethe warp supportsrll, herein shown as coml rest during weaving. u

, The drop wires1-2 are herein shown ask formed of .light sheet metal and provided prising rectangular members upon thetop edge portion of which the warpythreadS a eachrwith an opening 13 through which ay warp, thread' passes and byl which the drop wires` are `supported during weaving. yEach of the drop wires extends a substantial distance;aboveY the plane of the warp threads Y andzis provided with opening 14 through wln'cliLextenlcls the drop. wire guide V15 which may beconveniently supported ateach end Vby theside brackets or support 8, The con- Y,so yfarfdescribed may be as usual O11 of any preferred form, with theexception that' ythe openings 14 in the drop wires arev enlarged or made' wider than usual, so that when a drop wire isreleased by its warp thread it may be deflected out of the linef'of the series of drop wires to locate the warp Vfault,as will hereinafter be more Yfully described. t c

Mounted adjacent the lower ends of the warp Ysupports 11, two, of' which 'are shown inthe present instance, are the warp fault locating deiiectorsl, which are Vof novel construction., The deflectors 16 are herein shown as secured to the inner portionsof the warp Asupports adjacenttheir lowerends,

and onev convenientmeans of. securingfthe delector-s in: the desired positionrnay be constituted by the`r screws 17 passed through the Vlower portions of the warp supports and into the body portion of the deiiectors.

Each deflector 16 is provided with aV downwardly deflecting surface 18 which'is nor?` 11121-115( below the. lower ends of the drop wires when the latter Y are in their normal supported .position during weaving, the construction beingvsucln in this respect, that, shouldv adr-op wire. `b e released by its associated warp thread, itwill drop :fromits Y raised to,t its lowered position,`as indicated in Fig. 2, and the lower rounded edgefportion 19 of the dro-p wire will ride along the downwardly inclined surface 18 of the de? iector intoA the path ofthevibrating detecf tor, toj thereby .cause loom stoppage'.

lower ends of the drop .wires when the latter are "supported bythe warp threads during weaving, and the vertical surface 22 of each deflector merges, as at 23, into therdownwardly inclinedfdeflectingsurface 18,

YThe ldivision walls'20of each deliector are shown as carried upwardly along the vertical surface 22, with the result that theY lower end .portion of the drop wires when they are normally supported by theV warp threads during weaving'may rest: between the division walls adjacent the vertical surface L22 ofthe deflector, and thereby preventflateral or sidewise movement ofthe drop wires duringweaving. .1 Y,

In the present instancevof the invention, each deflector 16,V constructed substantially as hereinbefore; described, is shown .asliavf` ing the division wall l formed by cuttingv into the material of the defleotor, but 'itis evi-v dent that such division walls may be otherwise provided, the essentials in this regard being that when a drop wire is Vrelefkised by its warp thread, owing to breakage or too slack-condition of such warp thread, the lower rounded end portion ofthe drop wire may ride alongthe downwardly inclined de-V flecting surfaceflS and be guidedin such movement by the division walls, and where the division walls 20 extend upwardly adjacent the vertical surface 22, they may act, by engagement with the lower endsoftllel drop wires when normally supportedby thel war-p` threads, to prevent lateral/'movement of the drop wires. i Y f v Duringweaving, the drop wires l2are normally supported by the warp'` threads. which rest upon; the top surfaces of the warp Surrrts 11 and ,Where thedeector is carriedupwardly,gas indicated, and the division walls themselves are Vlikewise carried upwardly, oppositeV the lower ends of the drop wires when in normal position,

Vsuch division; walls maintain the drop wires fronr laterall displacement.` t

Should, a warp 'thread break orbecome too slack for weaving purposes, the asso.

llO

ciated dropfwire will move downwardly,the Y lower end at suchV times engaging the in-V clined deflecting surface 18 of the deflector v below it, and the released drop wirewillbe deflected into the position indicated` Fig. 2, the lower end portion latsuch times' pass.-' in g into the path of movement ofthe drop wire detector, and the upper portion ofthe drop wire,j as Aindicated atllig.l 2, will be displaced or deflectedV from the line ofl drop wires, yto indicate'the locationof the'fwarp fault. "In order that such deflection mayv take place, the openings 14 in thedrop wires yare made s uciently wide not, only to accommodate the drop wire guides 15, but to permtthe drop wires. themselves toV be. 'de-V flected by` the deflector when released;

the associated warp thread.

As indicatedi'at i, the left of ,Fig- 2, the

preferred construction contemplates thatv tl'ievlowerl end portion'of each drop wire /shall rest against? the vertical surface 22 at 'the upper portion ofthe associated'deector and that the drop wire guide lmay :it-such times .rest against therside, surface 24 forming one wall of theopeningl4 in each drop wire, the result being that ywhen a drop wire is released, it will` move downwardly,

, its lower rounded end 19 traveling between the division walls, and engage the deflectingl surface 18, while the upper portion ,of` the `drop wire willloey displaced vfrom the Yline of drop wires.

In the present instance of the invention,

i only two banks of drop kwires are shown,

but it is evident thatl any number of 4banks of drop wires may be employed in connec-l tion with the present invention, V'which is constituted more Vparticularly by the warp j fault locating deflector which may be read-V ilyapplied to any of the existing warp stop mechanisms now in use. The invention is simple, effective andYeasily applied, and? serves to indicate the warp fault bythe fact lthat the upper portion of the released drop y wire when in `its deflected position, as indicated in Fig. 2, will be a substantial distancel above thc plane of the'warprthreads.

What is claimed is: l l. In al mechanical warp stop threads during weaving, warp supports one at each side of the series` ofdrop wires on which the warp threads rest, a dropwire deflector projecting from the inner face ofl the warp supports and each having an inclined surface diverging downwardly from the inner face of the warp 4supports fordefle'cting a released drop wire, and a vibrating detector adapted to engage and be stopped Y by a deflected drop wire.v

2, In a mechanical warp stop mechanism for looms, the combination'of a series of drop wires normally supported by the warp threads duringweaving, a warp support on which the lwarp threads rest during weaving, a detector havingl adetecting movementtowards and from` the vertical planeof the` normally supported drop wires, a fixed drop wire deector having a downwardly in- @lined deflect-ing surface arranged in the ver- Y tical path of downward movement of a drop wire whenfitfails to be supported by a. warp thread during weaving that the lower end of t-lie released drop wire will ride over the inclined deflecting surface of the def-lector. as it moves downwardly from its ynormally'sup-- ported position and causev the upperr end of the released drop wire to be tilted to one side of the plane of the normally supported drop wires prior to engagement bythe detector. A

. rest during weaving mechanism for looms, the combination of a series ofV drop wires normally supported by the warp f of a warp fault.

tance above the planeof the'warp threads in both their supported and released positions,

warp supports one at'each side of the series of drop-wires oi'rwhich the warp .threads f a warp 'fault locating` deilector' at the lower inner portion ofthe `warp Vsupports eachhaving aY downwardly diverging inclined deflecting surface lacting to tilt a released drop wire'to locate theY warp 1 fault, anda drop wire 'detector having a detecting movement below the normally` supported drop wires during weavingand' tolwards thev path vof which Vthe lower end of the drop wire is'deflected onvthe occurrence l vof a warp fault. Y Y

4. In a mechanicalwarp stop mechanism for looms, thev combination `of a series of drop wires which project a substantial dis tance above vthe plane of the warp threads -inrboth'their supported and released posif'v tions, warp supports on Vwhich thewarp threads rest during weaving, awarp fault locating deflector at the -lower vinner por-y tion* of the warp support having an inclined Y' *Y deflecting .surface diverging` downwardly from the inner surface of the warpsupports and acting to tilt a released drop vwire to locate the warp fault,y and division walls betweenrwh'icli the lower end of. a drop wire Vhas guided vertical movement during vweaving, and a drop wire detector having a de-v .tecting movement below the Anormally supported drop wires during weaving and into "the path of which the lower end of the drop wire is'deflected on the occurrence of a warp fault. i i Y 5. In a mechanical warp stop mechanism for looms, the combination of a series of drop wireswhich project a substantial distance above the plane of the warp threads in boththeir supported and released positions, warp supports on which the warp' threads rest duringlweaving, a warp faultV locating deflector secured at the lower inner portion of each of the warp supports having' a vertical .portion merging into a downl wardly diverging inclined deflecting surface acting to tilt a released drop wire to locate the warp fault, and a drop wire detectorrhaving a detecting movement belowf the normally supported drop wires during weaving and into the pathof which'the lowerV end of the drop wire is deflected on the occurrence 6.- In a lmechanical warp st'op'mechanism for looms, the combination of a series of drop wires which project a substantial Ydistance above the plane of the warp threads in both supports o n which the warp threads rest during weaving, a warp fault locating deflector Y secured totlielower inner portion ofeach 'of their supported and released positions, warp Y the Warp supports having a vertical surface extending above the lowei1 ends of vthe drop Wire When normally supported by the Warp threads and a downwardly inclined deflect- "i ing slnnee acting to tilt a released drop Wire to locate jglie Warp fault, and adrop Wire detector having` a detecting movement below die normally supported'drop wires during Weaving;y und into the vpathiof which the lower end of the drop Wire is defleotedon the l0 occurrence of a Warp fault. ,Y `VIn testimony whereof, I have signed my name 11o Vthis specification.V v

yROBERT JAMESON.-r 

